大约有 44,900 项符合查询结果（耗时：0.0327秒） [XML]
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
... 教育 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索
App Inventor 2 UrsPahoMqttClient 拓展 - 物...
Get the first element of each tuple in a list in Python [duplicate]
...[x[0] for x in rows]
Below is a demonstration:
>>> rows = [(1, 2), (3, 4), (5, 6)]
>>> [x[0] for x in rows]
[1, 3, 5]
>>>
Alternately, you could use unpacking instead of x[0]:
res_list = [x for x,_ in rows]
Below is a demonstration:
>>> lst = [(1, 2), (...
Why should hash functions use a prime number modulus?
...ong time ago, I bought a data structures book off the bargain table for $1.25. In it, the explanation for a hashing function said that it should ultimately mod by a prime number because of "the nature of math".
...
Select top 10 records for each category
...
228
If you are using SQL 2005 you can do something like this...
SELECT rs.Field1,rs.Field2
F...
How do I add multiple arguments to my custom template filter in a django template?
... example, if you want a filter that checks if variable X is in the list [1,2,3,4] you will want a template filter that looks like this:
{% if X|is_in:"1,2,3,4" %}
Now we can create your templatetag like this:
from django.template import Library
register = Library()
def is_in(var, args):
if...
Problems installing the devtools package
...
|
edited May 23 '17 at 11:33
Community♦
111 silver badge
answered Jan 4 '14 at 17:15
...
How do I get user IP address in django?
...
|
edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Jan 3 '11 at 4:08
...
How do I write a short literal in C++?
...
82
((short)2)
Yeah, it's not strictly a short literal, more of a casted-int, but the behaviour is...
Bootstrap 3 offset on right not left
...bout filling blank columns, just make sure they don't add up to more than 12.
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<div class="container">
<div class="row">
<div class="col-xs-3 col-xs-offset-9">
...